Binding and impregnating materials made from waste sulfite liquors.



45 glue or binding substance.

No Drawing.

. bran s rars PATENT clarion.

EMIL POLLACSEK, 0F SPEZIA, ITALY.

BINDING AND IMPREGNATING' MATERIALS MADE FROM vWASTE SULFITE LIQUORS.

To all whom it may concern:

Be it known that I, EMIL POLLACSE1E,Sl1bject of the King of. Hungary, residing at Spezia, Italy, have invented certain new and useful Improvements in and Relating 'to Binding and Impregnating Materials Made from Waste Sulfite Liquors; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

As is well known, it has been several times proposed to utilize waste sulfite liquors for the manufacture of glues 'or binding substances, by evaporating the liquors with the addition of lime. satlsfactory results have not however been so far obtained from proposals for the following reasons:

1. The liquors contain free acid which corrodes the evaporating vessels. If liquor mixed with lime is being evaporated, a froth is formed .after the liquid has reached a certain concentration, and the mass cakes; and adheres to the walls of the vessel.

2. Onaccount' of the adhesion of the solidified mass to the walls of the vessel, the

removal of the mass requires a great deal of time and labor and cannot be effected without loss of material.

3. The sticky nature of the finished product renders it very diificult to pack same for the purpose of sending it to the. place of consumption.

.4. Although the product seems hard and brittle immediately on being obtained, it soon becomes tough and sticky again as it energetically absorbs moisture from the air. This greatly increases the difliculty of mixing it with large masses of pulverulent or' fine-grained substances, for the agglomeration of which the product is intended.

5. The drawbacks above referred to result in frequent stoppages of the apparatus for the manufacture'or treatment of the 6. The bindin substance hitherto known, made fromsu te liquor, are soluble in water.

The object of the present process is to manufacture from sulfite liquor a binding. and impregnating substance insoluble in water, and, at the same time, to avoid the difiiculties arising in its manufacture and treatment. In this process lime and mineral oil are added to the sulfite liquor.

Specification of Letters Patent.

thes

According to this invention, the excess of lime added to the liquor, is removed during the evaporation by means of rock oil distillate deprived of benzin. The concentration of the liquor which has become a thick fluid is then continued, and more heavy oil is added in a hot state, whereupon the whole mass is allowed to cool. The mass is now mixed again with heavy oil, lime paste is added and the whole boiled. The process is carried 'out in the following manner: The liquor is mixed with a slight excess of lime and evaporated until froth is formed. A heavy rock oil distillate is then introduced drop by drop, theresult being that the oil distillate envelops the calcium compounds which are being formed. The mixture of oil and calcium salts can now be removed from the surface of the liquid and decomposed into its ingredients in order to recover the oil. The liquid deprived of its excess of lime is then evaporated until a sample taken is thoroughly mixed. This treatment does not diminish or impair the adhesive power of the product. For the purpose ofrendering the product insoluble in water a further quantity of oil is added until the mass consists of about 5 parts of oil to 4 parts of the product. This mass is now mixed with 1.5 parts of slaked lime. paste and thereafter boiled. v

The product manufactured in the mannerdescribed, represents a binding medium for pulverulent or fine-grained substances which are insoluble in water, or an impregnating substance for timber, hemp cables or the like.- The said product may be used in Patented Mar. St), 19115.

Application filed September 10, 1913. Serial No. 789,145.

various proportionsand mixed with hydrate of calcium, crude oil deprived of benzin, and water, according to the nature of the materials to be agglomerated or impregascertained by the cessation of air bubbles nating medium is preferably made of 50 parts by Weight of solid main binding substance, 50 parts by weight of crude oil deprived of benzin, and -520v parts by weight of hydrate of calcium, which mixture is thoroughly :mixed with such a quantity of Water and heated with access of air for such a time that the liquid shows a density of -25 Baum (B) In order to agglomerat iron ore or blast furnace dust with scrap iron, for each 100 parts of the material, 5 7 parts of solid main-binding substance and3 t parts of hydrate of calcium are used together with as much water as is required'in order to impregnate the mass and render same plastic.

(C) For forming coal briquetsfrom coal dust, for each IOOparts of the material, 4-5

parts of solid main binding substance, 5 parts of crude oil deprived of benzin and 2 parts of burnt lime or a correspondingly greater quantity of hydrate of calcium are used. The addition of water is calculated so that the binding mixture should have a density of 32-35 Baum.

(D) For manufacturing an insulating or paving material from pulverulent or finegrained substances, a binding mixture is used consisting of 5-10 parts of the solid main binding substance for 100 parts of the 35 pulverulent or fine-grained substance, to-

gether with 1-6 parts crude oil and 8-15 parts hydrate of Claims: 7 1. A process for the manufacture of a binding and impregnating medium from waste sulfite liquors, lime, and mineral oil,

calcium.

which comprises adding lime to the sulfite' liquor, heating the mixture tojthefrothing stage, adding a heavy rock oil distillate, removing the'oily mixture containing the cal cium compounds, continuing the concentra- I period'and separating the resulting mixture of oil and excess of lime.

In testimony that I claim the foregoing 'asmy invention, I have signed my name in presence of two subscribing witnesses.

EMIL POLLA'CSEK.

Witnesses: i

, .A.NGELO DORAQUIA, C. A. FERRARI. 

